Mining-tool.



A. W. HARRIS. MINING TOOL.

APPLICATION FILED MAY 26, 1911.

1,008,818, 7 Patented Nov. 14, 1911.

UNTTED STATES PATENT QFFTCE.

ARATIA W. HARRIS, 0F LINTON, INDIANA.

MINING-TOOL.

To all whom it may concern:

Be it known that I, A.RATIA W. HARRIS, a citizen of the United States,residing at Linton,-in the county of Greene and State of Indiana, haveinventednew and useful Improvements in Mining-Tools, of which thefollowing is a specification.

This invention relates to mining tools, and has particular applicationto certain novel and useful improvements in a device of the classdescribed adapted particularly for breaking down coal, ore, slate, andthe like in mines.

In carrying out my invention, it is my purpose to provide a tool ordevice, in the nature of a wedge which is designed to be inserted inbores or holes near the roof or top of a vein or body of coal, or thelike, which has been cut or undercut, so that when the device isactuated as hereinafter described, the coal may be easily and readilybroken down without resort-ing to the use of high explosives, therebynot only obviating the danger attendant upon the use of such explosives,but I also obtain coal in better condition.

It is also my purpose to provide a mining tool which will embrace in itsconstruction the desirable features of simplicity, strength anddurability, and another object of my invention is the provision of atool which will be effective in its operation and which may bemanufactured and marketed at a relatively low cost.

With the above-recited objects and others of a similar nature in view,the invention consists in the construction, combination and arrangementof parts, set forth in and falling within the scope of the appendedclaims.

In the accompanying drawing :-Figure 1 is a perspective view of a miningtool embodying my invention. Fig. 2 is a perspective view of the angularwedge carrying plate. Fig. 3 is a cross sectional view, taken throughthe two edge members on the line 33 of Fig. 1. Fig. 4 is a front view ofmy device with the screw shaft and nut on the latter shown in verticalcross section.

Referring now to the accompanying drawing in detail, the numeral 5designates a metallic bar or plate, having longitudinally extendingguide flanges 6-6 along the edges thereof, and at one end the plate isprovided with an extension member or wall 7, formed at right anglesthereto, and preferably in- Specification of Letters Patent.

Application filed May 26, 1911.

Patented Nov. 14:, 1911.

Serial No. 629,542.

tegral therewith. When the tool is in use, the plate 5 extendshorizontally into the bore or hole, the plate or extension 7 beingarranged vertically and forming the front of the wedge carrying andguiding portion of the tool.

The numeral 8 indicates the lower wedge of the tool which is designed toride along the base plate between the guide flanges thereof, therelatively wide or butt end of the wedge extending inward, while at thenarrow end said wedge is connected to one end of the screw rod 9, saidrod projecting through an aperture 10 in the vertical wall of theguiding member, said aperture being arranged adjacent to the horizontalplate. This screw rod extends a desired distance outward from thevertical plate or wall and has threaded thereon a nut 11 providedcircumferentially with bores or sockets 12 for the reception of the endof a turning bar by means of which said nut may be turned to draw thewedge toward the vertical wall of the device.

The top member of the wedge is shown at 13 and is oppositely disposedrelative to the lower wedge, that is to say, the widened portion of theupper wedge extends above the narrow end of the lower wedge, theinclined faces 14 and 14 of the upper and lower wedges, respectively,being brought into contact. Upon the inclined face of the lower wedge, Iform grooves 15, one at each side for the reception of the guide lugs 16carried at the narrow end of the top wedge member. At its widened end,this top member is provided with a T-shaped head 17 designed to beinserted through the vertically extending longitudinal slot 18 formed inthe vertical wall of the guide member, said head locking the wedgemember to said wall when said wedge is turned to its normal position.

From the above description, taken in connection with the accompanyingdrawing, the construction and manner of employing my mining tool will beapparent to those skilled in the art. In employing the device,

vice end-to-end thereby expanding the tool and forcing the body of coalto break down the same.

It will beseen that I have provided a simple yet effective device whichis adapted to be employed especially in coal mines for breaking down thecoal instead of resorting to the use of dangerous explosives.

Having thus described the invention, I claim 1. A mining tool comprisinga guiding member, a wedge section having a parallel face resting ontheguiding member, a second wedge section having an inclined faceadjacent to the inclined face of the first wedge section, an extensionon the guiding member having a slot therein and an aperture below saidslot, a head projecting from the second wedge member and extendingthrough the slot, and a rod connected to the first wedge section andprojecting through the aperture.

2. A mining tool comprising a base member having guide lugs extendinglongitudinally of the sidev edges thereof, a wall at one end of the basemember and extending at an angle thereto, a lower wedge member slidingon the base, an upper wedge member on the lower wedge member having aprojection extending through the wall, a

threaded rod projecting through said wall and connected to the lowerwedge member, and a nut threaded on said rod.

3. A mining tool comprising a base plate having guide lugs extendinglongitudinally of the side edges thereof, a second plate at one end ofthe base plate and extending at right angles thereto, said second platehaving an elongated slot formed therein and an aperture spaced apartfrom the slot, a lower wedge member sliding on the base plate and havinggrooves for receiving the guide lugs, a top wedge member sliding on thelower wedge member and provided with projecting lugs adapted to move ingrooves formed longitudinally in the sides of the lower wedge member, ahead carried by the top member adapted to extend through the slot in theend plate, a screw rod carried at one end of the lower wedge member andextending through the aperture in said end plate, and a nut threaded onsaid rod.

In testimony whereof I affix my signature in presence of two witnesses.

ARATIA W. HARRIS. Witnesses:

GEO. W. SHARP,

DAVID MOPHAIL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

